| blob | f3aaee8528696b8e4ef558304c0fb060fc8bdae4 |
1 /* { dg-do compile } */
2 /* { dg-options "-O2" } */
3 // { dg-additional-options "-Wno-return-type" }
4 namespace sigc {
5 template <class T_type> struct type_trait {
6 typedef T_type& pass;
7 typedef const T_type& take;
8 typedef T_type* pointer;
9 };
10 template <class T_type> struct type_trait<T_type&> {
11 typedef T_type& pass;
12 };
13 template<> struct type_trait<void> {
14 typedef void pass;
15 };
16 template <class T_base, class T_derived> struct is_base_and_derived {
17 struct big {
18 char memory[64];
19 };
20 static big is_base_class_(...);
21 static char is_base_class_(typename type_trait<T_base>::pointer);
22 static const bool value = sizeof(is_base_class_(reinterpret_cast<typename type_trait<T_derived>::pointer>(0))) == sizeof(char);
23 };
24 struct nil;
25 struct functor_base {
26 };
27 template <class T_functor, bool I_derives_functor_base=is_base_and_derived<functor_base,T_functor>::value> struct functor_trait {
28 typedef typename T_functor::result_type result_type;
29 typedef T_functor functor_type;
30 };
31 struct adaptor_base : public functor_base {
32 };
33 template <class T_functor, class T_arg1=void,class T_arg2=void,class T_arg3=void,class T_arg4=void,class T_arg5=void,class T_arg6=void,class T_arg7=void, bool I_derives_adaptor_base=is_base_and_derived<adaptor_base,T_functor>::value> struct deduce_result_type {
34 typedef typename functor_trait<T_functor>::result_type type;
35 };
36 template <class T_functor> struct adaptor_functor
37 : public adaptor_base {
38 template <class T_arg1=void,class T_arg2=void,class T_arg3=void,class T_arg4=void,class T_arg5=void,class T_arg6=void,class T_arg7=void> struct deduce_result_type {
39 typedef typename sigc::deduce_result_type<T_functor, T_arg1,T_arg2,T_arg3,T_arg4,T_arg5,T_arg6,T_arg7>::type type;
40 };
41 typedef typename functor_trait<T_functor>::result_type result_type;
42 template <class T_arg1,class T_arg2> typename deduce_result_type<T_arg1,T_arg2>::type operator()(T_arg1 _A_arg1,T_arg2 _A_arg2) const {
43 return functor_(_A_arg1,_A_arg2);
44 }
45 explicit adaptor_functor(const T_functor& _A_functor) : functor_(_A_functor) {
46 }
47 mutable T_functor functor_;
48 };
49 template <class T_functor, bool I_isadaptor = is_base_and_derived<adaptor_base, T_functor>::value> struct adaptor_trait;
50 template <class T_functor> struct adaptor_trait<T_functor, true> {
51 typedef T_functor adaptor_type;
52 };
53 template <class T_functor> struct adaptor_trait<T_functor, false> {
54 typedef typename functor_trait<T_functor>::functor_type functor_type;
55 typedef adaptor_functor<functor_type> adaptor_type;
56 };
57 template <class T_functor> struct adapts
58 : public adaptor_base {
59 typedef typename adaptor_trait<T_functor>::adaptor_type adaptor_type;
60 explicit adapts(const T_functor& _A_functor) : functor_(_A_functor) {
61 }
62 mutable adaptor_type functor_;
63 };
64 template <class T_type> struct unwrap_reference {
65 typedef T_type type;
66 };
67 template <class T_type> class bound_argument {
68 public:
69 bound_argument(const T_type& _A_argument) : visited_(_A_argument) {
70 }
71 inline T_type& invoke() {
72 }
73 T_type visited_;
74 };
75 template <int I_location, class T_functor, class T_type1=nil,class T_type2=nil,class T_type3=nil,class T_type4=nil,class T_type5=nil,class T_type6=nil,class T_type7=nil> struct bind_functor;
76 template <class T_functor, class T_bound> struct bind_functor<0, T_functor, T_bound, nil,nil,nil,nil,nil,nil> : public adapts<T_functor> {
77 typedef typename adapts<T_functor>::adaptor_type adaptor_type;
78 template <class T_arg1=void,class T_arg2=void,class T_arg3=void,class T_arg4=void,class T_arg5=void,class T_arg6=void,class T_arg7=void> struct deduce_result_type {
79 typedef typename adaptor_type::template deduce_result_type<typename type_trait<typename unwrap_reference<T_bound>::type>::pass, typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass, typename type_trait<T_arg4>::pass, typename type_trait<T_arg5>::pass, typename type_trait<T_arg6>::pass>::type type;
80 };
81 typedef typename adaptor_type::result_type result_type;
82 result_type operator()() {
83 return this->functor_.template operator()<typename type_trait<typename unwrap_reference<T_bound>::type>::pass> (bound_.invoke());
84 }
85 template <class T_arg1> typename deduce_result_type<T_arg1>::type operator()(T_arg1 _A_arg1) {
86 return this->functor_.template operator()<typename type_trait<typename unwrap_reference<T_bound>::type>::pass, typename type_trait<T_arg1>::pass> (bound_.invoke(), _A_arg1);
87 }
88 bind_functor(typename type_trait<T_functor>::take _A_func, typename type_trait<T_bound>::take _A_bound) : adapts<T_functor>(_A_func), bound_(_A_bound) {
89 }
90 bound_argument<T_bound> bound_;
91 };
92 template <int I_location, class T_bound1, class T_functor> inline bind_functor<I_location, T_functor, T_bound1> bind(const T_functor& _A_func, T_bound1 _A_b1) {
93 return bind_functor<I_location, T_functor, T_bound1>(_A_func, _A_b1);
94 };
95 }
96 struct foo {
97 typedef int result_type;
98 int operator()(int i, int j);
99 };
100 int main() {
101 sigc::bind<0>(sigc::bind<0>(foo(),7),8)();
102 }